NAS or "Network Attached Storages" are hard drives that you can address via your network. You and other users can use it to save and access data, for example to carry out backups in the network or to distribute media. In practice, even simple NAS drives can do more than “just” back up data. For example, you can host server applications on a NAS, set up an in-house alternative to cloud storage such as Dropbox or provide a full-fledged media server for films, photos and music. Of course, for all of this to work, you'll need to set up your NAS first. Don't worry: Despite working on the network, installing the NAS is not particularly difficult. We'll show you how the setup works using an ASUSTOR NAS system.The first steps in particular can be transferred practically one-to-one to NAS systems from other manufacturers, such as Synology, QNAP or Western Digital.
NAS drives: RAID levels and hard drives
There are countless models to choose from when buying a NAS drive. The most important decision is: How many hard drives do you want to install? The most common are 2-bay NAS, i.e. NAS enclosures with slots for two hard drives. NAS systems with four or more disks are also used, especially in professional environments. The hard drives also determine the available RAID levels at which the NAS can be operated. Put simply, this is the way in which the hard drives work together (you can find out more about the different RAID levels here). For most users, buying a 2-bay NAS that operates in RAID 1 mode is recommended. The NAS stores all data twice on the two hard drives. The reason for this:If one disk fails sooner or later, the data is still available on the other hard disk. If you replace the defective hard disk, the NAS will reconstruct the data on the replacement disk and you can continue working without data loss. Of course, in the worst case it can happen that both hard disks fail at the same time (therefore it is advisable to always create an additional backup despite RAID), but the probability of this is significantly lower than with individual operation.Always create an additional backup despite RAID), but the probability of this is significantly lower than with stand-alone operation.Always create an additional backup despite RAID), but the probability of this is significantly lower than with stand-alone operation.
The downside of RAID 1: Due to the redundant data storage, only half the hard drive capacity is available in practice. For example, if you install two 4 terabytes of hard drives in your NAS, you will not have eight, but only four TB of storage. The gain in protection for the stored data usually outweighs this limitation without any problems..
To set up a NAS on your network: